CN113383270A - Illumination device and imaging device - Google Patents

Abstract

The illumination device (4) is applied to an imaging unit for imaging an object. The lighting device (4) is provided with: an objective lens cover (132) which is composed of a member that can transmit light and is provided so as to guide the light from the object to the imaging unit in order for the imaging unit to image the object; and light sources (141, 142, 143) provided on the image pickup section side of the objective lens cover (132) and illuminating the subject through the objective lens cover (132). The light sources (141, 142, 143) are disposed outside of a reversal region that approximately reverses a region defined by a predetermined light beam included in a light beam on the object side of the objective lens cover (132) among light beams incident on the image pickup element (44) from the object side via the imaging lenses (41a, 41b) in a state where the imaging lenses (41a, 41b) are in focus with an object in contact with the objective lens cover (132) to the image pickup unit in a state where the predetermined light beam is on the object side of the objective lens cover (132).

Description

Illumination device and imaging device

Technical Field

The present invention relates to an illumination device and an imaging device provided with the illumination device.

Background

As an image pickup apparatus including an illumination apparatus, for example, an image pickup apparatus disclosed in cited document 1 is known. The imaging device includes an objective lens that is in contact with the skin of a human body via a gel, a plurality of light sources that irradiate light, and an imaging unit that captures an image. The skin in contact with the objective lens is illuminated by a plurality of light sources provided inside the imaging device, and is imaged by the imaging unit.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5797921

Disclosure of Invention

Problems to be solved by the invention

In general, in an imaging device for imaging the skin, the objective lens needs to be in contact with the skin surface via a gel in order to remove reflection of light from the skin surface. However, depending on the position of the light source for illuminating the skin, the light of the light source is reflected by the objective lens, and there is a possibility that the skin cannot be properly imaged due to the influence of the reflected light of the light source. Such a problem is not limited to the case of imaging the skin, but the same problem may occur in the case of imaging another object.

The present invention has been made in view of the above problems, and an object thereof is to provide an illumination device capable of suppressing the influence of reflected light from a light source and appropriately capturing an image of an object, and an image capturing apparatus including the illumination device.

Means for solving the problems

In order to achieve the above object, an illumination device according to the present invention is an illumination device applied to an imaging unit for imaging a subject, the illumination device including:

an objective lens cover configured by a member that transmits light, and configured to guide light from the object to the imaging unit in order for the imaging unit to image the object; and

a light source provided on the image pickup section side of the objective lens cover and configured to illuminate the object through the objective lens cover,

the image pickup section includes an image pickup element that picks up an image of the object and an image pickup lens that forms an image of the object on the image pickup element,

the light source is provided outside an inversion region, the inversion region being a region where a region defined by a predetermined light ray included in a light flux incident on the image pickup device from the object side via the imaging lens in a state where the imaging lens is focused on the object in contact with the objective lens cover, the light flux being closer to the object side than the objective lens cover, is substantially inverted to the image pickup unit side in the objective lens cover.

Effects of the invention

According to the present invention, the object can be appropriately imaged while suppressing the influence of the reflected light of the light source.

Drawings

Fig. 1A is a perspective view of a dermoscopic camera to which embodiment 1 of the present invention is applied, and is a view of a state in which an adapter is not attached.

Fig. 1B is a perspective view of a dermoscopic camera to which embodiment 1 of the present invention is applied, and is a view of a state in which an adapter is attached.

Fig. 2 is an exploded perspective view of the dermatoscopic camera.

Fig. 3 is a perspective cross-sectional view of an image pickup unit provided in the dermatoscope camera.

Fig. 4 is a front view of the illumination device provided in the dermatoscope camera as viewed from an arrow IV in fig. 1A.

Fig. 5 is a cross-sectional view of the lighting device cut by the cutting line V-V in fig. 4.

Fig. 6 is a cross-sectional view of the lighting device with the adapter installed.

Fig. 7 is a front view of a base portion of the lighting device main body.

Fig. 8 is a front view of a state where the first LED substrate is detached from the base portion of the lighting device main body.

Fig. 9 is an enlarged view of the "IX" portion in fig. 5.

Fig. 10 is a partial cross-sectional view of a dermatoscopic camera.

Fig. 11 is a schematic view showing a case where light is irradiated at the time of the second dermatoscopy.

Fig. 12 is a partial cross-sectional view of a dermato logical camera with an adapter installed.

Fig. 13 is a schematic view showing a case where light is irradiated at the time of the second dermatoscopy.

Fig. 14A is a diagram showing an illuminance distribution of the second objective lens cover based on a simulation, and is a diagram when the LED for the second dermatoscopy imaging is caused to emit light.

Fig. 14B is a diagram showing an illuminance distribution of the second objective lens cover based on a simulation, and is a diagram when the LED for the first dermatoscope optical imaging is caused to emit light.

Fig. 15 is a flowchart for explaining an imaging operation of the dermatoscope camera.

Fig. 16 is a flowchart for explaining the dermatoscope imaging operation.

Fig. 17 is a flowchart for explaining the first dermoscopic imaging operation.

Fig. 18 is a flowchart for explaining the second dermatoscopic photographing operation.

Fig. 19 is an explanatory diagram for explaining the set focal position of the imaging target.

Fig. 20 is a partial sectional view of the dermatoscope camera of embodiment 2.

Fig. 21 is a partial sectional view of the dermatome camera of embodiment 2 with the adapter attached.

Fig. 22A is an explanatory diagram for explaining movement in the operation of the LED substrate of the dermatoscope camera according to the modification of the present invention.

Fig. 22B is an explanatory diagram for explaining rotation in the operation of the LED substrate of the dermatome camera according to the modification of the present invention.

Fig. 23 is a flowchart for explaining an imaging operation of the dermatoscope camera according to the modification of the present invention.

Detailed Description

Hereinafter, an embodiment of a dermatome camera to which the present invention is applied will be described with reference to the drawings. In addition, in the present specification, a Microscope (Microscope): microscope "and" Microscopy (microscopi): based on the examination by a microscope or the use of a microscope (method) as a standard, the terms "Dermoscopy (dermospope)" and "Dermoscopy (dermospopy)" are used in the meaning of a magnifying glass (device) for skin examination and a skin examination using the magnifying glass or the use (behavior) of the magnifying glass.

In the following description, as shown in fig. 1A and 1B, the imaging target (object) side is defined as the front (front ) of the dermatological camera 1, the opposite side is defined as the rear, and the vertical and horizontal directions when the dermatological camera 1 is viewed from the front are directly defined as the vertical and horizontal directions. The mounting of each member is performed by an appropriate method such as mounting using a screw or a screw, or mounting by fitting, unless otherwise mentioned.

(embodiment 1)

A dermatoscope camera 1 according to embodiment 1 as an example of an imaging apparatus is an imaging apparatus that captures an image for diagnosing a state of skin. The dermatoscope camera 1 can capture an image of an imaging target in a state where the adapter 70 is attached as shown in fig. 1B and in a state where the adapter 70 is detached as shown in fig. 1A. As described later, the adapter 70 is used for imaging narrow parts such as between fingers and a dent of an ear.

As shown in fig. 2, the dermatoscope camera 1 has a controller 2, a camera body 3 provided in front of the controller 2, and an illumination device 4 provided in front of the camera body 3.

The controller 2 has: a display unit 10 provided with a touch panel type liquid crystal monitor 11, the touch panel type liquid crystal monitor 11 displaying various kinds of operation information and captured images and serving as setting means for accepting user operations; a main body 20 provided with operation buttons such as a shutter button 21 and a power button 22; and a circuit board 30 housed between the display unit 10 and the main body unit 20. The circuit board 30 is provided with a storage unit 200 for storing captured images and a control unit 300 for controlling each unit of the dermatoscope camera 1.

The camera body 3 includes an imaging unit 40 and a housing 50 attached to a cover 60 described later in a state of supporting the imaging unit 40. Fig. 3 is a perspective cross-sectional view of the imaging unit 40 provided in the dermatoscope camera 1. The image pickup section 40 has an image pickup lens system 41 having a lens group provided on the optical axis OA. Further, a circuit wiring board 43 and an image pickup device 44 are housed at the rear of the image pickup lens system 41, and an Infrared Cut Filter (IRCF) 45, an ultraviolet transmission Filter 46, and a polarization Filter 47 are disposed in this order from the front. Further, on the left side of the imaging section 40, a flexible circuit substrate 48 for operating the imaging section 40 by the controller 2 (fig. 2) extends.

The imaging lens system 41 includes a lens group having a first imaging lens 41a and a second imaging lens 41b on an optical axis OA, and a lens barrel 41c in which the second imaging lens 41b is housed. The first imaging lens 41a and the second imaging lens 41b are interposed between a skin disease part to be imaged and the imaging device 44, and form an image of the imaging target on the imaging device 44. The first imaging lens 41a can be moved in the front-rear direction, and thus the focal length is changed, and the magnification can be changed. The first imaging lens 41a and the second imaging lens 41b are combined to enlarge the affected part of the patient by 10 to 30 times.

The image pickup Device 44 is a known image pickup Device, such as a CCD (Charge Coupled Device) image sensor, a CMOS (Complementary Metal Oxide Semiconductor) image sensor, or the like, and is configured to convert an optical image of an object into an electric signal. The imaging unit 40 can image an imaging object using the imaging element 44. The imaging unit 40 can capture, for example, still images and moving images.

As shown in fig. 2, the lighting device 4 includes: a cover 60 attached to the main body 20 of the controller 2; an illumination device main body 100 attached to the front end of the cover 60; and an adapter 70 attached to the cover 60 and covering the front of the lighting apparatus main body 100. As described above, the adapter 70 is detachably attached to the cover 60 when imaging narrow parts such as the space between fingers and the depression of the ear, and is detached when the imaging part is a face or an arm. In this way, the adapter 70 constitutes a part of the illumination device 4 when used for image capturing, and is not included in the illumination device 4 when not used for image capturing.

As shown in fig. 1A, 1B, 2, 4, and 5, the cover 60 is formed in a cylindrical shape, and the camera body 3 is housed inside the cover. As shown in fig. 4, 4 protrusions 61 are arranged at equal intervals on the outer peripheral surface of the cover 60. The projection 61 engages with the adapter 70 when the adapter 70 is attached, and releases the engagement with the adapter 70 when the adapter 70 is detached. As shown in fig. 4, 2 detection switches 62 are disposed at equal intervals on the outer peripheral surface of the cover 60 in the vicinity of the protrusion 61. When the illumination device 4 is viewed from the front, the 2 detection switches 62 are arranged along the up-down direction with the optical axis OA interposed therebetween. As shown in fig. 6, the detection switch 62 is biased in a direction protruding from the cover 60 by a spring 62 a. When the adapter 70 is removed, the detection switch 62 protrudes from the cover 60 and is in an off state. On the other hand, when the adapter 70 is attached via the projection 61, the detection switch 62 is pressed by the adapter 70 and is retracted. At this time, the state of the detection switch 62 is turned on. The 2 detection switches 62 function as detection means for detecting attachment and detachment of the adapter 70.

As shown in fig. 5, the lighting device body 100 includes: a base part 110 as a Light source on which a plurality of LED substrates on which LEDs (Light Emitting diodes) are mounted are provided; an annular first cover part 120 covering the periphery of the base part 110; and a second cover portion 130 screwed to the first cover portion 120.

As shown in fig. 5, 7, and 8, the base portion 110 includes a base portion main body 180, and first to sixth LED boards 111, 112, 113, 114, 115, and 116 and 4 polarizing plates 117 provided on the base portion main body 180.

The base portion main body 180 is made of, for example, black synthetic resin. As shown in fig. 5 and 8, the base portion main body 180 includes: a cylindrical portion 181; an annular portion 182 formed at the tip of the cylindrical portion 181; first to fourth wall portions 183 to 186 provided on the radial inner side of the annular portion 182 and extending obliquely rearward from the annular portion 182; 4 connecting portions 187 disposed between the adjacent first to fourth wall portions 183 to 186; and a fifth wall 188 connecting the edges of the first to fourth walls 183 to 186.

As shown in fig. 5, the outer diameter of the cylindrical portion 181 is substantially the same as the inner diameter of the cover 60, and the outer peripheral surface of the cylindrical portion 181 is fitted to the inner peripheral surface of the cover 60. Thereby, the base unit main body 180 is attached to the cover 60.

As shown in fig. 7 and 8, the annular portion 182 has a board mounting surface 182a on which the first LED board 111 is mounted. The board mounting surface 182a is a flat surface formed to face forward, and 4 screw holes 182b for mounting the first LED board 111 are formed.

As shown in fig. 5 and 8, the first wall portion 183 is formed in a rectangular plate shape, and its main surface is inclined with respect to the optical axis OA, slightly downward toward the front. The first wall 183 is attached with the second LED board 112 from the rear by screws not shown, and is formed with an opening 183a for exposing the LEDs 141, 142, and 143 of the second LED board 112 forward. As shown in fig. 8, a polarizing plate 117 is attached to the front surface of the first wall 183.

As shown in fig. 8, the second wall portion 184 has a rectangular plate shape, and a main surface thereof is inclined slightly leftward toward the front with respect to the optical axis OA. The second wall portion 184 is attached with the third LED board 113 from the rear by screws not shown, and is formed with an opening 184a for exposing the LEDs 141, 142, and 143 of the third LED board 113 forward. As shown in fig. 8, a polarizing plate 117 is attached to the front surface of the second wall 184.

As shown in fig. 5 and 8, the third wall portion 185 is formed in a rectangular plate shape, and its main surface is inclined with respect to the optical axis OA, slightly upward toward the front. The fourth LED board 114 is mounted on the third wall 185 from the rear by screws not shown, and an opening 185a is formed to expose the LEDs 141, 142, and 143 of the fourth LED board 114 forward. As shown in fig. 8, a polarizing plate 117 is attached to the front surface of the third wall 185.

As shown in fig. 8, the fourth wall portion 186 is formed in a rectangular shape, and its main surface is inclined slightly rightward toward the front with respect to the optical axis OA. The fifth LED board 115 is mounted to the fourth wall 186 from the rear by screws, not shown, and an opening 186a is formed to expose the LEDs 141, 142, and 143 of the fifth LED board 115 forward. As shown in fig. 8, a polarizing plate 117 is attached to the front surface of the fourth wall 186.

The 4 connecting portions 187 are formed between the rectangular first to fourth wall portions 183 to 186 extending obliquely rearward from the annular portion 182. In this way, the 4 connecting portions 187 connect the adjacent first to fourth wall portions 183 to 186 to form continuous wall portions in the circumferential direction together with the first to fourth wall portions 183 to 186.

As shown in fig. 5 and 8, the fifth wall 188 is a rectangular wall that faces forward, and is connected to the edges of the first to fourth walls 183 to 186 that extend rearward. The fifth wall 188 is attached with the sixth LED board 116 from the rear by screws not shown, and is formed with an opening 188a for exposing the 4 LEDs 144 provided on the sixth LED board 116 forward. In addition, a barrel insertion hole 188b through which the barrel 41c of the imaging section shown in fig. 3 is inserted is formed in the center of the fifth wall section 188.

The base portion main body 180 is fitted and attached to the cover 60 shown in fig. 6 while holding the first to sixth LED boards 111, 112, 113, 114, 115, and 116 and the polarizing plate 117.

As shown in fig. 5, 7, and 8, the first LED board 111 is an annular board attached to the board attachment surface 182a of the base portion main body 180 by screws 189 (fig. 7), and includes 16 LEDs 140 arranged in the circumferential direction. The LED140 is, for example, an LED that emits white light, and functions as a ring flash that emits light from the outer peripheral position of the lighting device body 100 toward the front. When a skin disease portion (normal image capture) is captured by the skin mirror camera 1 (fig. 1A) as a general camera, the LED140 emits light to irradiate the skin disease portion.

As shown in fig. 5 and 8, the second LED board 112 is a rectangular board that is screwed from the rear to the first wall 183 of the base unit body 180 and extends in the left-right direction. As shown in fig. 8, the LEDs 141 that emit visible light, the LEDs 142 that emit visible light, the LEDs 143 that emit ultraviolet light, the LEDs 142 that emit visible light, and the LEDs 141 that emit visible light are arranged in a row in this order from the left side to the right side on the second LED substrate 112. Of which 2 LEDs 142 are covered by a polarizing plate 117. Thereby, 2 LEDs 142 emit polarized light. As shown in fig. 5, the second LED board 112 is provided on the first wall 183 inclined forward with respect to the vertical direction. Therefore, the LEDs 141, 142, and 143 provided on the second LED board 112 are arranged so as to face the optical axis OA of the imaging unit 40, i.e., slightly downward in the forward direction in fig. 5.

As shown in fig. 8, the third LED board 113 is a rectangular board that is screwed from the rear to the second wall 184 of the base unit body 180 and extends in the vertical direction, and is arranged in a direction orthogonal to the second LED board 112. On the third LED substrate 113, as in the second LED substrate 112, the LEDs 141 that emit visible light, the LEDs 142 that emit visible light, the LEDs 143 that emit ultraviolet light, the LEDs 142 that emit visible light, and the LEDs 141 that emit visible light are arranged in a row in this order from the top to the bottom. Note that the 2 LEDs 142 are covered with the polarizing plate 117, which is also the same as the second LED substrate 112. The third LED board 113 is provided on the inclined second wall portion 184 of the base portion main body 180, and the LEDs 141, 142, and 143 provided on the third LED board 113 are arranged so as to face the optical axis OA of the imaging portion 40, that is, slightly leftward in the front direction in fig. 8.

As shown in fig. 8, the fourth LED substrate 114 has the same structure as the second LED substrate 112 rotated by 180 ° about the optical axis OA. That is, the LEDs 141, 142, 143 of the second LED substrate 112 and the LEDs 141, 142, 143 of the fourth LED substrate 114 are disposed vertically symmetrically about the optical axis OA. Since the LEDs 141, 142, and 143 provided on the fourth LED board 114 are arranged slightly upward in the forward direction, light is emitted toward the optical axis OA. In addition, the 2 LEDs 142 provided to the fourth LED substrate 114 are covered with the polarizing plate 117. As shown in fig. 8, the fifth LED substrate 115 has the same structure as the third LED substrate 113 rotated by 180 ° about the optical axis OA. That is, the LEDs 141, 142, 143 of the third LED substrate 113 and the LEDs 141, 142, 143 of the fifth LED substrate 115 are arranged symmetrically with respect to the optical axis OA. Since the LEDs 141, 142, and 143 provided on the fifth LED substrate 115 are arranged slightly rightward in the forward direction, light is emitted toward the optical axis OA. In addition, the 2 LEDs 142 provided to the fifth LED substrate 115 are covered with the polarizing plate 117. When performing a percutaneous endoscopic imaging (first percutaneous endoscopic imaging) with the illumination device 4 shown in fig. 5 with the adapter 70 (fig. 6) removed, the LEDs 141, 142, and 143 provided on the second to fifth LED boards 112, 113, 114, and 115, respectively, irradiate the skin disease portion with light. Further, the LEDs 142 and 143 other than the LED141 irradiate the skin disease portion with light also when performing the dermatoscopy imaging (second dermatoscopy imaging) in the state of the illumination device 4 shown in fig. 6 with the adapter 70 attached.

As shown in fig. 5 and 8, the sixth LED board 116 is a rectangular board screwed from the rear to the fifth wall 188 of the base unit body 180. The sixth LED board 116 is formed with a barrel insertion hole 116a that matches a barrel insertion hole 188b formed in the fifth wall portion 188 of the base unit main body 180. In addition, on the sixth LED substrate 116, 4 LEDs 144 that emit visible light at the time of the second dermatoscope photographing are arranged around the barrel insertion hole 188b (116 a). The 4 LEDs 144 are arranged so as to face forward, and emit light toward the front opened by an opening 188a formed in the fifth wall 188 of the base main body 180. The 4 LEDs 144 provided on the sixth LED substrate 116 irradiate the skin disease area with light instead of the LED141 when the second dermatoscopy imaging is performed.

In this way, the lighting device 4 is provided with: an LED140 that emits light during normal imaging; an LED141 that emits light only when the first dermatoscope photographing is performed; an LED144 that emits light only when the second dermatoscopic photographing is performed; and LEDs 142 and 143 that emit light when performing the first and second percutaneous imaging.

As shown in fig. 5, the first cover portion 120 covering the periphery of the front end portion of the base portion 110 includes a first cover portion body 121 and a light-transmitting plate 122 provided on the front surface of the first cover portion body 121. The first cover body 121 is made of, for example, black synthetic resin, and includes, as shown in fig. 9, an annular cover portion 121a covering the front of the first LED board 111, and a cylindrical outer wall portion 121b and an inner wall portion 121c erected on the cover portion 121 a. The first cover portion 120 is attached to the base portion main body 180 with the outer wall portion 121b and the inner wall portion 121c in contact with the annular portion 182. A receiving space a for receiving the first LED substrate 111 and the LEDs 140 is formed on the rear surface of the first cover body 121. The housing space a is formed by the cover portion 121a, the outer wall portion 121b, the inner wall portion 121c, and the annular portion 182 of the base portion body 180. Further, a light emitting hole 121d is formed in the cover portion 121a at a position corresponding to the LED 140. Therefore, as shown in fig. 4, 16 light exit holes 121d are formed in the first cover part 120 corresponding to the 16 LEDs 140 provided on the first LED substrate 111. The light transmitting plate 122 is made of, for example, a transparent synthetic resin, transmits light from the LED140 emitted through the light emitting hole 121d, and covers the light emitting hole 121d to prevent dust from entering the inside of the dermatoscope camera 1. By emitting light from the LEDs 140 through the plurality of light emitting holes 121d arranged in the circumferential direction in this manner, the lighting device 4 can function as a ring flash.

As shown in fig. 9, the outer wall portion 121b and the inner wall portion 121c of the first cover body 121 are formed to cover the outer and inner end surfaces 111a and 111a of the first LED board 111 in the radial direction, respectively. As described above, the base portion body 180 and the first cover portion body 121 defining the housing space a are formed of, for example, black synthetic resin. Thereby, the light from the LEDs 140 transmitted through the first LED substrate 111 is absorbed by the base portion main body 180, the outer wall portion 121b, and the inner wall portion 121 c. For example, the light L1 that has passed through the first LED board 111 and is emitted from the inner end surface 111a is absorbed by the inner wall 121 c. The light L2 that has passed through the first LED board 111 and has proceeded backward is absorbed by the base portion main body 180. Accordingly, the light emitted from the LED140 is emitted from the housing space a to the outside only through the light emitting hole 121d, and light leakage into the interior of the dermatological camera 1 (for example, as shown in fig. 10, the tip of the lens barrel 41c and the space B where the LEDs 141, 142, 143, and 144 for dermatological imaging are located) can be suppressed. As shown in fig. 9, an internal thread 121e for attaching the second cover portion 130 is formed in the inner wall portion 121 c.

As shown in fig. 4 to 6, the second cover portion 130 includes a cylindrical body 131 as a first cover formed in a circular truncated cone shape and having a cylindrical shape, and a first objective lens cover 132 fitted into an opening 131a at the top (distal end) of the cylindrical body 131. The cylinder 131 is made of a material that does not transmit light so that the transmitted light is not converted into an electric signal by the image pickup element, and is made of a resin such as a polyvinyl chloride derivative or an acrylic resin. Further, a paint for preventing light transmission may be applied to the surface of the cylindrical body 131. The inner circumferential surface of the cylindrical body 131 is subjected to texturing or anti-reflection coating for suppressing reflection of light. As shown in fig. 9, a male screw 131b to be screwed with the female screw 121e formed on the inner wall 121c is formed on the bottom (rear end) of the cylindrical body 131. The male screw 131b and the female screw 121e formed in the first cover part 120 function as attachment and detachment means for attaching and detaching the second cover part 130 to and from the first cover part 120.

The first objective lens cover 132 shown in fig. 5 is made of a member that can transmit light, for example, glass, and is formed in a disc shape. The first objective lens cover 132 is disposed so that its main surface is orthogonal to the optical axis OA, and the area of the main surface of the first objective lens cover 132 is set to a predetermined first area. In the case of performing a dermoscopic imaging of a skin patient, it is important to suppress diffuse reflection of light on the skin surface. In order to suppress the diffuse reflection of light, gel is applied to the skin patient, and the first objective lens cover 132 is pressed from above. This can block the air layer between the skin affected area and the first objective lens cover 132, thereby suppressing the diffuse reflection of light on the skin surface. In this way, the first objective lens cover 132 pressed against the skin affected area transmits light from the LEDs 141, 142, 143, 144 mounted on the second to sixth LED boards 112 to 116 shown in fig. 8, irradiates the skin affected area with light, and guides light reflected by the skin affected area into the skin mirror camera 1 to the imaging unit 40.

In the first dermoscopic imaging, as shown in fig. 10, an area r2 in which the skin S1 contacts the tip of the cylinder 131 is formed around an area r1 in which the skin S1 contacts the first objective lens cover 132. The barrel 131 in contact with the skin S1 in the region r2 blocks external light, and the skin S1 in contact with the first objective lens cover 132 is not easily affected by the external light. This allows the skin S1 in contact with the first objective lens cover 132 to be efficiently irradiated with light from the LEDs 141, 142, 143, and 144 mounted on the second to sixth LED boards 112 to 116. Further, by pressing the first objective lens cover 132 against the skin S1, the distance between the skin S1 and the dermoscopic camera 1 and the brightness of the illuminated skin S1 can be kept constant, and stable exposure conditions and the like can be achieved, thereby enabling stable dermoscopic imaging. Moreover, the first objective lens cover 132 protects the inside of the dermatoscope camera 1 from moisture, dust, and the like.

As shown in fig. 1B and 6, the adapter 70 includes a cylindrical body 71 as a second cover having a truncated cone shape, and a second objective lens cover 72 fitted into an opening 71a formed in a top portion (distal end portion) of the cylindrical body 71. The cylindrical body 71 is made of a resin such as a polyvinyl chloride derivative or an acrylic resin, and has an inner peripheral surface subjected to texturing or antireflection coating for suppressing reflection of light. As shown in fig. 6, a hook portion 71b is formed at the bottom (rear end) of the cylindrical body 71. The hook-shaped portion 71b is engaged with the protrusion 61 formed on the cover 60, whereby the adapter 70 can be attached to the cover 60. Thereby, the detection switch 62 is pushed and retracted by the inner wall 70a of the adapter 70, and is turned on. On the other hand, when the adapter 70 is detached from the cover 60, the hook-shaped portion 71b is expanded and the engagement with the protrusion 61 is released. Thereby, the detection switch 62 is released from the state of being pressed by the inner wall 70a of the adapter 70, protrudes from the cover 60, and is turned off. The hook-shaped portion 71b and the protrusion 61 function as attachment and detachment means for attaching and detaching the adapter 70 to and from the cover 60.

The second objective lens cover 72 is formed of a member that can transmit light, for example, a glass body, and is formed in a disk shape so as to be in contact with a skin patient portion that is an imaging target in the second dermatoscope imaging. The second objective lens cover 72 is disposed so that its main surface is orthogonal to the optical axis OA, and the area of the main surface of the second objective lens cover 72 is set to a predetermined second area smaller than the first area of the first objective lens cover 132. Therefore, the second objective lens cover 72 can be brought into contact with the skin patient portion of the narrow part through the tapered cylindrical body 71. By applying gel to the skin patient portion of the narrow part and pressing the second objective cover 72, diffuse reflection of light from the skin patient portion can be suppressed. The second objective lens cover 72 transmits light emitted from the LEDs 142 and 143 provided in the second to fifth LED boards 112 to 115 shown in fig. 8 and light emitted from the LED144 provided in the sixth LED board 116 to irradiate the skin affected part with light and also allows light reflected by the skin affected part to enter, at the time of second dermatoscopy imaging.

In the second dermatoscope shooting, as shown in fig. 12, an area r4 where the skin S2 contacts the tip of the cylinder 71 is formed around an area r3 where the skin S2 contacts the second objective lens cover 72. The cylinder 71 in contact with the skin S2 in the region r4 blocks outside light, and the skin S2 in contact with the second objective lens cover 72 is less likely to be affected by the outside light, and the second objective lens cover 72 is provided, whereby the effect of enabling stable percutaneous endoscopic imaging is the same as that obtained by providing the first objective lens cover 132.

Next, the arrangement of the LEDs as an example of the light emitting unit provided in the illumination device 4 will be described in detail with reference to fig. 10 to 13. In fig. 10 to 13, only the front portion of the dermatome camera 1 is illustrated in order to avoid complication of the drawings. The cutting position of the dermatoscope camera 1 in the cross-sectional views of fig. 10 to 13 is the same as the cutting position in the cross-sectional views of fig. 5 and 6, and is cut along the cutting line in the vertical direction. In fig. 11 and 13, the range irradiated with light by the LED is hatched, and the region irradiated with light is hatched in a darker color as it is brighter.

In the dermatoscope camera 1, as shown in fig. 10, the lens barrel 41c of the imaging lens system 41 is inserted into the barrel insertion holes 116a and 188b and protrudes from the base unit main body 180. At the time of the first dermatoscopy shooting, the image-taking lens system 41 moves the lens group so as to be in focus on the skin S1 in contact with the first objective lens cover 132. Assuming that the skin S1 comes into contact with the first objective lens cover 132 in this way, the path of light incident on the skin mirror camera 1 and further incident on the imaging element 44 via a lens group such as the first imaging lens 41a is as shown in fig. 10.

The point C is a point on the skin S1 and is located on the uppermost side in the range where the image can be captured by the image pickup device 44. Therefore, in the first dermatoscope imaging, among the light rays included in the light flux incident from the imaging subject to the imaging element 44 through the first objective lens cover 132, the light ray passing through the point C is positioned on the uppermost side (outer side). The light reflected at the point C on the skin S1 enters various directions, and a part thereof is incident on the image pickup element 44 via the lens group. Of the light rays incident on the image pickup element 44 through the point C, the uppermost light ray is an upper light ray 171, and the lowermost light ray is a lower light ray 172. The upper light ray 171 is the uppermost (outer) upper light ray among the plurality of upper light rays incident on the image pickup device 44 through the first objective lens cover 132. The upper and lower rays 171 and 172 passing through the point C pass through the first objective lens cover 132, are refracted by the lens group including the second and first photographing lenses 41b and 41a, and are condensed at a point C' at the end of the image pickup element 44. The light beam passing through the point C, i.e., the light beam (for example, the principal ray) between the upper light beam 171 and the lower light beam 172 similarly passes through the first objective lens cover 132, is refracted by the lens group such as the second imaging lens 41b, and is focused on the point C' at the end of the imaging element 44.

In the first dermoscopic imaging, when the skin S1 is brought into contact with the first objective lens cover 132, light is hardly incident from the front side of the first objective lens cover 132. Therefore, the light rays of the portion of the upper light ray 171 and the lower light ray 172 located on the front side (the skin S1 side) of the first objective lens cover 132 become virtual light rays, and therefore, the portion is also referred to as virtual upper light ray 171a and virtual lower light ray 172 a.

The inverted upper beam 171' is a virtual beam that is inverted toward the image pickup device 44 side with a line extending in the up-down direction (direction orthogonal to the optical axis OA) from the front surface 132a of the first objective lens cover 132 as a symmetry axis, in a portion (virtual upper beam 171a) of the upper beam 171 passing through the point C and located on the front side (skin S1 side) of the first objective lens cover 132. The inverted lower beam 172' is an imaginary beam in which a portion (imaginary lower beam 172a) of the lower beam 172 passing through the point C and located on the front side (skin S1 side) of the first objective lens cover 132 is inverted toward the image pickup device 44 side with a line extending in the vertical direction from the front surface 132a of the first objective lens cover 132 as a symmetry axis.

The point D is a point on the skin S1 and is located on the lowermost side in the range where the image can be captured by the image capture device 44. Therefore, in the first dermatoscope imaging, among the light rays included in the light flux incident from the imaging subject to the imaging element 44 through the first objective lens cover 132, the light ray passing through the point D is positioned on the lowermost side (outer side). The light reflected at the point D on the skin S1 enters various directions, and a part thereof is incident on the image pickup element 44 via the lens group. Of the light rays incident on the image pickup element 44 through the point D, the uppermost light ray is an upper light ray 173, and the lowermost light ray is a lower light ray 174. The down ray 174 is the lowest (outer) one of the plurality of down rays incident on the image pickup device 44 through the lens group. In addition, the upper light ray 173 and the lower light ray 174 are illustrated using a dotted line in such a manner as to be easily distinguished from the upper light ray 171 and the lower light ray 172 illustrated by a solid line. The upper ray 173 and the lower ray 174 passing through the point D pass through the first objective lens cover 132, are refracted by the lens group (the second imaging lens 41b, etc.), and are condensed at a point D' at the end of the imaging element 44. In addition, the light passing through the point D, i.e., the light (e.g., the principal ray) between the upper light 173 and the lower light 174, similarly passes through the first objective lens cover 132, is refracted in the lens group, and is condensed at a point C' at the end of the image pickup element 44.

In the first dermoscopic imaging, when the skin S1 is brought into contact with the first objective lens cover 132, light is hardly incident from the front side of the first objective lens cover 132. Therefore, the light rays of the portions of the upper light ray 173 and the lower light ray 174 on the front side (the skin S1 side) of the first objective lens cover 132 become virtual light rays, and therefore the portions are also referred to as virtual upper light rays 173a and virtual lower light rays 174 a.

The inverted upper beam 173' is a virtual beam that inverts the portion (virtual upper beam 173a) that passes through the upper beam 173 of the point D and is on the front side (skin S1 side) of the first objective lens cover 132 toward the image pickup device 44 side with a line extending in the up-down direction (direction orthogonal to the optical axis OA) from the front surface 132a of the first objective lens cover 132 as the axis of symmetry. The inverted lower beam 174' is an imaginary beam that inverts the portion (imaginary lower beam 174a) of the lower beam 174 passing through the point D and located on the front side (skin S1 side) of the first objective lens cover 132 toward the image pickup device 44 side with a line extending in the vertical direction from the front surface 132a of the first objective lens cover 132 as a symmetry axis.

Here, a region where a first region 501a is inverted with a line extending in the up-down direction (direction orthogonal to the optical axis OA) from the front surface 132a of the first objective lens cover 132 as a symmetry axis is a first inversion region 501b, and the first region 501a is a region located forward of the first objective lens cover 132, of regions sandwiched by the upper light ray 171, which is the uppermost upper light ray, and the lower light ray 174, which is the lowermost lower light ray, of the light rays included in the light flux incident on the imaging element 44 through the first objective lens cover 132. The first region 501a is a virtual region sandwiched between the virtual upper ray 171a and the virtual lower ray 174 a. The first inversion region 501b is a virtual region sandwiched between the inverted upper beam 171 'and the inverted lower beam 174'. The first region 501a and the first inversion region 501b are shown in a trapezoidal shape in a cross-sectional view, but in actuality, the first region 501a is a region formed by rotating the virtual upper beam 171a and the virtual lower beam 174a about the optical axis OA, and the first inversion region 501b is a region formed by inverting the region, and is a region having a truncated cone shape. At this time, the LEDs 141, 142, and 143 of the second LED substrate 112 and the fourth LED substrate 114 are located outside the first inversion region 501b as viewed from the optical axis OA. With such an arrangement, light from the LEDs 141, 142, and 143 reflected on the rear surface 132b of the first objective lens cover 132 can be restricted from entering the imaging element 44. This can suppress the influence of the reflected light from the LEDs 141, 142, and 143 reflected by the rear surface 132b of the first objective lens cover 132 in a region that does not affect the center of the captured image.

Further, the outermost light rays among the light rays included in the light flux incident on the image pickup element 44 in front of the first objective lens cover 132 are the virtual down light rays 172a and the virtual up light rays 173 a. A region where the second region 502a is inverted with a line extending in the up-down direction (direction orthogonal to the optical axis OA) from the front surface 132a of the first objective lens cover 132 as a symmetry axis is a second inverted region 502b, and the second region 502a is a region located forward of the first objective lens cover 132, of the regions sandwiched by the imaginary down ray 172a and the imaginary up ray 173 a. The second region 502a is a virtual region sandwiched between the virtual lower ray 172a and the virtual upper ray 173 a. The second inverted region 502b is also a virtual region sandwiched between the inverted lower beam 172 'and the inverted upper beam 173'. The second region 502a and the second inverted region 502b are shown in a trapezoidal shape in a cross-sectional view, but in actuality, the former second region 502a is a region formed by rotating the virtual down ray 172a and the virtual up ray 173a about the optical axis OA, and the latter second inverted region 502b is a region formed by inverting this region, and is a region in a truncated cone shape. The LEDs 141, 142, and 143 provided on the second LED substrate 112 and the fourth LED substrate 114 are arranged in the second inversion region 502 b. Accordingly, the LEDs 141, 142, and 143 are not arranged largely outside, and the size increase of the illumination device 4 and the skin mirror camera 1 can be suppressed.

The arrangement of the LEDs 141, 142, and 143 of the second LED substrate 112 and the fourth LED substrate 114 arranged in the vertical direction is described with reference to the cross-sectional view (fig. 10) cut along the vertical cutting line. Similarly, the arrangement of the LEDs 141, 142, and 143 of the third LED board 113 (fig. 8) and the fifth LED board 115 (fig. 8) arranged in the left-right direction can be described with reference to a cross-sectional view taken along the left-right direction. That is, the LEDs 141, 142, and 143 of the third LED substrate 113 (fig. 8) and the fifth LED substrate 115 (fig. 8) are also arranged in the second inversion region 502b, and in a region outside the first inversion region 501b when viewed from the optical axis OA.

As shown in fig. 11, the LEDs 141, 142, and 143 provided on the second LED substrate 112 are arranged so as to face slightly downward toward the front. Similarly, as shown in fig. 11, the LEDs 141, 142, and 143 provided on the fourth LED board 114 are arranged so as to face slightly upward toward the front. As shown in fig. 8, the LEDs 141, 142, and 143 provided in the third LED board 113 are arranged so as to face slightly to the left in the forward direction, and the LEDs 141, 142, and 143 provided in the fifth LED board 115 are arranged so as to face slightly to the right in the forward direction. With this arrangement, the LEDs 141, 142, and 143 provided on the second to fifth LED boards 112 to 115, which emit light during the first dermatoscope photographing, emit light toward the first objective lens cover 132. This makes it possible to locate the entire region of the first objective lens cover 132 in the brightly illuminated space B1, and to brightly illuminate the skin S1 in contact with the first objective lens cover 132 while suppressing uneven brightness.

As described above, when the first objective lens cover 132 focuses the light from the LEDs 141, 142, and 143 that emit light during the first dermoscopic imaging, the skin S1 can be brightly irradiated while suppressing unevenness in brightness. Further, by arranging the LEDs 141, 142, and 143 in the above-described manner, the influence of the reflected light of the LEDs 141, 142, and 143 reflected by the first objective lens cover 132 can be suppressed in a region that does not affect the center of the captured image, and the increase in size of the illumination device 4 and the dermatoscope camera 1 can be suppressed.

Next, a description will be given of an arrangement manner of the LEDs 144 provided on the sixth LED substrate 116 that emit light at the time of the second dermatoscope imaging. At the time of the second dermatoscopy shooting, the image pickup lens system 41 moves the lens groups, as shown in fig. 12, to focus on the skin S2 in contact with the second objective lens cover 72. In this way, the path of light incident on the skin mirror camera 1 and further incident on the imaging element 44 via the lens group such as the first imaging lens 41a is as shown in fig. 12, assuming that the skin S2 is in contact with the second objective lens cover 72.

The point E is a point on the skin S2 and is located on the uppermost side in the range where the image can be captured by the image pickup device 44. Therefore, in the second dermatoscope imaging, among the light rays included in the light flux incident from the imaging subject to the imaging element 44 through the second objective lens cover 72, the light ray passing through the point E is positioned on the uppermost side (outer side). The light reflected at the point E on the skin S2 enters various directions, and a part thereof is incident on the image pickup element 44 via the lens group. Of the light rays incident on the image pickup element 44 through the point E, the uppermost light ray is an upper light ray 175, and the lowermost light ray is a lower light ray 176. The upper beam 175 is the uppermost (outer) upper beam among the plurality of upper beams incident on the image pickup device 44 through the second objective lens cover 72. The upper and lower rays 175 and 176 passing through the point E are transmitted through the second objective lens cover 72 and the first objective lens cover 132, refracted in the lens group, and condensed at a point E' at the end of the image pickup element 44.

In the second dermatoscope imaging, when the skin S2 is brought into contact with the second objective lens cover 72, light hardly enters from the front side of the second objective lens cover 72. Therefore, the light rays of the portions of the upper light ray 175 and the lower light ray 176 on the front side (the skin S2 side) of the second objective lens cover 72 become virtual light rays, and therefore the portions are also referred to as virtual upper light rays 175a and virtual lower light rays 176 a.

The inverted upper beam 175' is a virtual beam in which a portion (virtual upper beam 175a) of the upper beam 175 passing through the point E and located on the front side (skin S2 side) of the second objective lens cover 72 is inverted toward the image pickup device 44 side with a line extending in the up-down direction (direction orthogonal to the optical axis OA) from the front surface 72a of the second objective lens cover 72 as a symmetry axis. The inverted lower beam 176' is an imaginary beam in which a portion (imaginary lower beam 176a) of the lower beam 176 passing through the point E and located on the front side (skin S2 side) of the second objective lens cover 72 is inverted toward the image pickup device 44 side with a line extending in the up-down direction from the front surface 72a of the second objective lens cover 72 as an axis of symmetry.

The point F is a point on the skin S2, and is located on the lowermost side in the range where the image can be captured by the image capture device 44. Therefore, in the second dermatoscope imaging, among the light rays included in the light flux incident from the imaging subject to the imaging element 44 through the second objective lens cover 72, the light ray passing through the point F is positioned on the lowermost side (outer side). The light reflected at the point F on the skin S2 enters various directions, and a part thereof is incident on the image pickup element 44 via the lens group. Of the light rays incident on the image pickup element 44 through the point F, the uppermost light ray is an upper light ray 177, and the lowermost light ray is a lower light ray 178. The down ray 178 is the lowest (outer) one of the plurality of down rays incident on the image pickup device 44 through the second objective lens cover 72. The upper and lower rays 177 and 178 passing through the point F pass through the second and first object covers 72 and 132, are refracted in the lens group, and are condensed at a point F' at the end of the image pickup element 44.

In the second dermatoscope imaging, when the skin S2 is brought into contact with the second objective lens cover 72, light hardly enters from the front side of the second objective lens cover 72. Therefore, the light rays of the portions of the upper light ray 177 and the lower light ray 178 on the front side (the skin S2 side) of the second objective lens cover 72 become virtual light rays, and therefore, the portions are also referred to as virtual upper light rays 177a and virtual lower light rays 178 a.

The inverted upper beam 177' is a virtual beam that is inverted toward the image pickup device 44 side with a line extending in the up-down direction (direction orthogonal to the optical axis OA) from the front surface 72a of the second lens cover 72 as a symmetry axis at a portion (virtual upper beam 177a) that passes through the upper beam 177 of the point F and is on the front side (skin S2 side) of the second lens cover 72. The inverted lower beam 178' is an imaginary beam that inverts the portion (imaginary lower beam 178a) of the lower beam 178 passing through the point F and located on the front side (skin S2 side) of the second objective lens cover 72 toward the image pickup device 44 side with a line extending in the vertical direction from the front surface 72a of the second objective lens cover 72 as a symmetry axis.

Here, a region where the third region 503a is inverted with a line extending in the up-down direction (direction orthogonal to the optical axis OA) from the front surface 72a of the second lens cover 72 as a symmetry axis is a third inversion region 503b, and the third region 503a is a region located forward of the second lens cover 72, of a region sandwiched by the upper light ray 175, which is the uppermost upper light ray, and the lower light ray 178, which is the lowermost lower light ray, among the light rays included in the light flux incident on the image pickup device 44 through the second lens cover 72. The third region 503a is an imaginary region sandwiched by the imaginary upper ray 175a and the imaginary lower ray 178 a. The third inverted region 503b is a virtual region sandwiched by the inverted upper ray 175 'and the inverted lower ray 178'. The third region 503a and the third inversion region 503b are shown in a trapezoidal shape in a cross-sectional view, but in actuality, the former third region 503a is a region formed by rotating the virtual upper beam 175a and the virtual lower beam 178a about the optical axis OA, and the latter third inversion region 503b is a region formed by inverting the region, and is a region in a truncated cone shape. At this time, the LEDs 144 provided on the sixth LED substrate 116 are located in the outer region of the third inversion region 503 b. The LEDs 144 provided on the sixth LED substrate 116 are also arranged in the same manner in a cross-sectional view taken along the left-right direction, and are located outside the third inversion region 503b as viewed from the optical axis OA. With such an arrangement, light from the LED144 reflected on the rear surface 72b of the second objective lens cover 72 can be restricted from entering the imaging element 44. This can suppress the influence of the reflected light of the LED144 reflected by the rear surface 72b of the second objective lens cover 72 in a region that does not affect the center of the captured image.

Further, the outermost light rays among the light rays included in the light flux incident on the second objective lens cover 72 of the image pickup device 44 are the virtual lower light rays 176a and the virtual upper light rays 177 a. A region where the fourth region 504a is inverted with a line extending in the up-down direction (direction orthogonal to the optical axis OA) from the front surface 72a of the second lens cover 72 as a symmetry axis is a fourth inversion region 504b, and the fourth region 504a is a region located forward of the second lens cover 72 out of the regions sandwiched by the virtual down ray 176a and the virtual up ray 177 a. The fourth region 504a is a virtual region sandwiched between the virtual down ray 176a and the virtual up ray 177 a. The fourth inverted region 504b is also a region sandwiched by the inverted down ray 176 'and the inverted up ray 177'. The fourth region 504a and the fourth reversal region 504b are shown in a trapezoidal shape in a cross-sectional view, but in actuality, the former fourth region 504a is a region formed by rotating the virtual down ray 176a and the virtual up ray 177a about the optical axis OA, and the latter fourth reversal region 504b is a region formed by reversing these regions, and is a region in the shape of a truncated cone. The LEDs 144 provided on the sixth LED substrate 116 are arranged in the fourth inversion region 504 b. The LEDs 144 provided on the sixth LED substrate 116 are also arranged in the same manner in a cross-sectional view taken along the left-right direction, and are arranged in the fourth inversion region 504 b. Thus, the LED144 can irradiate the second objective lens cover 72 with light from a position close to the optical axis OA, and can suppress unevenness of light irradiated to the skin S2.

As described above, the 4 LEDs 144 are arranged facing forward. As shown in fig. 13, light emitted forward from the 4 LEDs 144 during the second dermatoscopic imaging can be condensed by the second objective lens cover 72. This makes it possible to locate the entire area of the second objective lens cover 72 in the brightly illuminated space B4, and to brightly illuminate the skin S2 in contact with the second objective lens cover 72 while suppressing variations in brightness and darkness.

As described above, in the dermatoscopic camera 1, the LED141 emits visible light in the first dermatoscopic imaging, and the LED144 closer to the optical axis OA emits visible light in the second dermatoscopic imaging. This makes it easy to irradiate the second objective lens cover 72 having a small diameter and disposed around the optical axis OA. This can also be understood by the simulation of the illuminance distribution of the second objective lens cover shown in fig. 14A and 14B. Specifically, the LED emitting light is the LED144 shown in fig. 8 in fig. 14A, and is the 8 LEDs 141 shown in fig. 8 in fig. 14B. In the region 73 of the second objective lens cover shown in fig. 14A, uneven brightness is suppressed, and uniform bright illumination is performed. On the other hand, in the region 74 of the second objective lens cover shown in fig. 14B, there is a region 74a in which light is not sufficiently irradiated and becomes dark, and uneven brightness occurs.

In this way, when the first dermatoscope imaging LED141 (fig. 8) is caused to emit light, the arrangement of the LED141 is given as a reason for the occurrence of brightness unevenness in the second objective lens cover 72. As described above, the first dermatoscope LED141 is disposed to irradiate light toward the first objective lens cover 132. Focusing on the light emitted from 1 of the LEDs 141, as shown in fig. 11, the light transmitted through the first objective lens cover 132 irradiates a part of the second objective lens cover 72, but does not irradiate the entire area. Therefore, a part of the second objective lens cover 72 is located in the brightly illuminated space B1, and the remaining areas of the second objective lens cover 72 are located in the spaces B2 and B3 which are darker than the space B1. This causes shading in the second objective lens cover 72. Such uneven brightness occurs significantly in the LED141 disposed at the farthest position from the optical axis OA among the LEDs 141, 142, and 143 that emit light during the first dermatoscopic imaging.

On the other hand, by disposing the second dermatoscopic imaging LED144 closer to the optical axis OA than the first dermatoscopic imaging LED141, the second objective lens cover 72 can be uniformly irradiated with light emitted forward from the LED144 as shown in fig. 13. This makes it possible to suppress brightness unevenness in the image captured in the second dermatoscopy, and to capture an image that is easy to diagnose.

Next, the operation of the dermatoscope camera 1 will be described with reference to fig. 15 to 19. In fig. 19, only the configuration of the dermatoscope camera 1 necessary for explaining the focal position is illustrated for easy understanding of the drawings. The operations of the respective sections of the dermoscopic camera 1 are controlled by a control section 300 provided on the circuit board 30 shown in fig. 2. The control Unit 300 is composed of a CPU (Central Processing Unit), and the circuit board 30 is provided with an I/O interface, a ROM (Read Only Memory), and a RAM (Random Access Memory). The CPU is, for example, a microprocessor or the like, and is a central processing unit that executes various processes or calculations. The control unit 300 reads out a control program stored in the ROM, and controls the operations of the respective units of the dermatoscope camera 1 by executing the control program by the CPU while using the RAM as a work memory.

When the user operates the power button 22 (fig. 1A and 1B), the dermatome camera 1 is activated, and first, as shown in fig. 15, the user receives a setting of the shooting mode (step S11). The shooting modes include a normal shooting mode in which the above-described normal shooting is performed, a first DC (demoscopy) shooting mode in which first dermatoscopy shooting is performed, and a second DC shooting mode in which second dermatoscopy shooting is performed. The dermatoscope camera 1 displays 3 selectable shooting modes on a touch panel type liquid crystal monitor 11 provided in a display unit 10 shown in fig. 2. The user selects any 1 of the above-described 3 shooting modes by touch operation on the liquid crystal monitor 11, and in response, the control unit 300 sets the shooting mode to the selected shooting mode.

Next, the control unit 300 determines whether or not the normal shooting mode is set as the shooting mode (step S12). In step S12, when the normal shooting mode is set (yes in step S12), the control unit 300 determines whether or not the adapter 70 is attached to the lighting device 4 (step S13). The presence or absence of the attachment of the adapter 70 is determined from the on/off state of the detection switch 62. That is, when the 2 detection switches 62 are in the off state in the state of protruding from the cover 60, the control unit 300 determines that the adapter 70 is not mounted. On the other hand, when the 2 detection switches 62 are in the on state in the retracted state, and when one of the 2 detection switches 62 is in the on state and the other is in the off state, the control unit 300 determines that the adapter 70 is in the attached state. The state in which only one of the detection switches 62 is turned on means a state in which the adapter 70 is not completely attached to the cover 60.

In step S13, if the control unit 300 determines that the adapter 70 is not in the attached state to the lighting device 4 (no in step S13), the LED140 for normal imaging (fig. 5) is turned on (step S14). This brightly illuminates the affected skin area.

When it is determined in step S13 that the adapter 70 is mounted (yes in step S13), the control unit 300 reports the removal of the adapter 70 (step S17). For example, the control unit 300 may prompt the user to detach the adapter 70 by displaying "detach request" on the liquid crystal monitor 11 (fig. 2). This enables the user to detach the adapter 70, and the light from the LED140 can be brightly irradiated to the skin disease portion without being blocked by the adapter 70 in the normal shooting.

Next, when the user half-presses the shutter button 21 shown in fig. 1A, the control unit 300 moves the lens group of the imaging lens system 41 to automatically focus on the skin lesion to be imaged within the focusing range P1 to infinity (step S15). Here, P1 is the focus start position, and the lens group is moved to the ∞ position while searching for the focus position.

Here, the focus start position P1 will be described. The two-dot chain line in fig. 19 indicates a virtual image of the components of the dermatoscope camera 1 reflected on the rear surface 132b of the first objective lens cover 132. These virtual images are generated at positions symmetrical to the solid object across the rear surface 132 b. That is, the virtual image 41 c' of the lens barrel 41c located at the position separated by the distance d1 from the rear surface 132b of the first objective lens cover 132 is generated at the position separated by the distance d1 across the rear surface 132 b. In addition, a virtual image 144' of the LED144 located at a position separated from the rear surface 132b of the first objective lens cover 132 by a distance d2 is generated at a position separated from the rear surface 132b by a distance d 2. Likewise, a virtual image 180' of the base portion main body 180 located at a position separated from the rear surface 132b of the first objective lens cover 132 by a distance d3 is generated at a position separated from the rear surface 132b by a distance d 3. Here, when the virtual image generation range D1 in which the virtual image reflected on the rear surface 132b is located is brought into focus, the tip end portion of the virtual image 41c ' of the in-focus lens barrel 41c, the unevenness formed on the surface of the virtual image 180 ' of the base unit main body 180, various jigs, or the virtual image 144 ' of the LED144 may be reflected on the captured image. Therefore, the focus start position P1 is set at a position deviated from the virtual image generation range D1.

In addition, during normal imaging, the user can recognize the distance between the skin lesion to be imaged and the front surface 132a of the first objective lens cover 132. Therefore, when the normal imaging mode is set in step S11, the liquid crystal monitor 11 shown in fig. 2 may display a space between the first objective lens cover 132 and the affected skin part where the virtual image is not reflected in the captured image, and may urge the user to shift the focal position from the virtual image generation range D1. This allows the skin lesion to be imaged to be located between the focus start position P1 and the ∞ position, and thus automatic focusing can be smoothly completed.

Next, when the user presses the shutter button 21 shown in fig. 1A, the control unit 300 normally captures an image of the skin affected area and stores the normally captured image (step S16). This completes the normal imaging of the skin disease area.

On the other hand, when it is determined in step S11 that the first DC photographing mode or the second DC photographing mode is set (no in step S12), the control section 300 performs the dermoscopic photographing operation (step S20).

In the dermatoscopic photographing operation (step S20), first, as shown in fig. 16, the control unit 300 determines whether the photographing mode is set to the first DC photographing mode (step S21). When the first DC photographing mode is set (yes in step S21), the control unit 300 determines whether or not the adapter 70 is attached to the lighting device 4 (step S22). As described above, the presence or absence of the attachment of the adapter 70 is determined from the on/off state of the detection switch 62. When it is determined in step S22 that the adapter 70 is not mounted (no in step S22), the control unit 300 performs a first dermoscopic photographing operation (step S30).

On the other hand, when it is determined in step S22 that the adapter 70 is mounted (step S22: YES), the control unit 300 reports that the adapter 70 is dismounted (step S23). This can urge the user to detach the adapter 70. Thereby, the first dermoscopic photographing operation can be executed in an appropriate state with the adapter 70 removed (S30).

In the first dermoscopic imaging operation (step S30), as shown in fig. 17, the controller 300 temporarily sets the focal position of the skin disease area to be imaged to P2 (step S31). Here, as shown in fig. 19, the focal position P2 is a position of the front surface 132a of the first objective lens cover 132 that is in contact with the skin patient portion. This enables the focal position to be set to the position of the skin disease to be imaged in advance.

Next, the control unit 300 causes the 8 LEDs 141 (fig. 8) that emit visible light to emit light (step S32). Thereby, the skin disease portion in contact with the first objective lens cover 132 (fig. 11) is more brightly irradiated with visible light. Next, when the user half-presses the shutter button 21 shown in fig. 1A, the control unit 300 automatically focuses on the skin lesion to be imaged (step S33). As described above, in step S31, since the focal position is set to the position of the skin affected area in contact with the first objective lens cover 132 in advance, the autofocus can be smoothly completed. Next, when the user presses the shutter button 21 shown in fig. 1A, the control unit 300 performs first dermatoscopy imaging on the skin patient area, and stores the imaged image (step S34). Next, the control unit 300 turns off the 8 LEDs 141 (fig. 8) (step S35). In this way, by executing steps S32 to S35, first dermatoscopy imaging of the skin disease area irradiated with visible light can be performed.

Next, the controller 300 causes the 8 LEDs 142 (fig. 8) emitting visible light to emit light, and emits light polarized by the polarizing plate 117 (fig. 8) (step S36). Thereby, the skin disease portion in contact with the first objective lens cover 132 (fig. 11) is more brightly irradiated with the polarized light. Next, the control unit 300 performs the first dermoscopic imaging of the skin patient portion, and stores the imaged image (step S37). Next, the control unit 300 turns off the 8 LEDs 142 (fig. 8) (step S38). In this way, by executing steps S36 to S38, first dermatoscopy imaging of the skin disease portion irradiated with polarized light can be performed.

Next, the control unit 300 causes the 4 LEDs 143 (fig. 8) emitting ultraviolet light to emit light (step S39). Thereby, the skin disease portion in contact with the first objective lens cover 132 (fig. 11) is brightly irradiated with ultraviolet light. Next, the control unit 300 performs the first dermoscopic imaging of the skin patient portion, and stores the imaged image (step S40). Next, the control unit 300 turns off the 4 LEDs 143 (fig. 8) (step S41). In this way, by executing steps S39 to S41, first dermatoscopy imaging of the skin disease area irradiated with ultraviolet light can be performed.

As described above, in the first dermatoscope imaging, the skin affected area irradiated with visible light, the skin affected area irradiated with polarized light, and the skin affected area irradiated with ultraviolet light are continuously imaged by operating the shutter button 21 (fig. 1A) once, and the imaged images are recorded. Since the autofocus for the skin affected area is executed in step S33, the autofocus operation can be omitted in the first dermatoscope imaging to be performed later.

On the other hand, as shown in fig. 16, when the second DC photographing mode is set (no in step S21), the control unit 300 determines whether or not the adapter 70 is in the state of being attached to the lighting device 4 (step S24). At this time, when at least 1 of the 2 detection switches 62 is in the on state in the retracted state, the control unit 300 determines that the adapter 70 is mounted (step S24: yes), and advances the process to step S25. On the other hand, when 2 detection switches 62 are in the off state (NO in step S24), control unit 300 reports that adapter 70 is mounted (step S26). For example, the control unit 300 may display "please mount the adapter" on the liquid crystal monitor 11 (fig. 2) to urge the user to mount the adapter 70. This enables the user to attach the adapter 70, and to perform imaging in an appropriate state with the adapter 70 attached at the time of the second dermatoscopy imaging.

When it is determined that the adapter 70 is mounted (step S24: YES), the control section 300 determines whether the adapter 70 is normally mounted (step S25). When the 2 detection switches 62 are in the on state, the control unit 300 determines that the adapter 70 is normally attached (yes in step S25), and executes the second dermoscopic photographing operation (step S50).

On the other hand, when it is determined in step S25 that the adapter 70 is not normally mounted (step S25: NO), the control section 300 reports remounting of the adapter 70 (step S27). For example, the control unit 300 displays "the adapter is not normally mounted on the liquid crystal monitor 11 (fig. 2). Please install the adapter again. ", the user is prompted to reinstall the adapter 70. Thereby, the second dermatoscopic photographing operation can be performed in a state where the adapter 70 is normally attached (S50).

In the second dermatoscopic imaging operation (step S50), as shown in fig. 18, the control unit 300 temporarily sets the focal position of the skin disease portion to be imaged to P3 (step S51). Here, as shown in fig. 19, the focal position P3 is a position of the front surface 72a of the second objective lens cover 72 that is in contact with the skin patient portion at the time of the second dermatoscopy photographing. This enables the focal position to be set to the position of the skin disease portion in contact with the second objective lens cover 72 in advance.

Next, the control unit 300 causes the 4 LEDs 144 (fig. 8) that emit visible light to emit light (step S52). The 4 LEDs 144 are light sources disposed close to the optical axis OA for the second dermatoscopic imaging. Thereby, the skin disease portion in contact with the second objective lens cover 72 (fig. 13) is more brightly irradiated with visible light. Next, when the user half-presses the shutter button 21 shown in fig. 1B, the control unit 300 automatically focuses on the skin lesion to be imaged (step S53). As described above, in step S34, the control unit 300 can smoothly complete the auto-focusing because the focal position is set to the position of the skin disease portion in contact with the second objective lens cover 72 in advance. Next, when the user presses the shutter button 21 shown in fig. 1B, the control unit 300 performs the second dermatoscopy imaging of the skin disease portion, and saves the imaged image (step S54). Next, the control unit 300 turns off the 4 LEDs 144 (fig. 8) (step S55). In this way, by executing steps S52 to S55, the second dermatoscopic imaging of the skin disease portion irradiated with the visible light can be executed.

The next steps S56 to S58 are steps in which the controller 300 causes the LED142 to emit light and performs a second dermatoscope image of the skin disease area irradiated with the polarized light. These steps S56 to S58 are different from the presence or absence of use of the adapter 70, but are the same as the steps S36 to S38 in the first dermatoscope shooting shown in fig. 17. Steps S59 to S61 executed thereafter are steps in which the controller 300 causes the LED143 to emit light, and performs a second dermatoscopy image of the skin disease area irradiated with ultraviolet light. These steps S59 to S61 are different from the presence or absence of use of the adapter 70, but are the same as the steps S39 to S41 in the first dermatoscope shooting shown in fig. 17. Therefore, detailed description of these steps is omitted.

As described above, in the second dermatoscopic imaging, the shutter button 21 (fig. 1B) is operated once to continuously image the skin affected area irradiated with the visible light, the skin affected area irradiated with the polarized light, and the skin affected area irradiated with the ultraviolet light, and the imaged images are recorded. In addition, since the autofocus for the skin affected area is executed in step S53, the autofocus operation can be omitted in the second dermatoscope imaging to be performed later.

As described above, in the dermatoscopic camera 1 using the illumination device 4 to which the present invention is applied, the LEDs 141, 142, and 143 for the first dermatoscopic photographing are arranged outside the first inversion region 501b and within the second inversion region 502 b. The second dermatological mirror imaging LED144 is disposed outside the third inversion region 503b and inside the fourth inversion region 504 b. This can suppress the increase in size of the apparatus and suppress the influence of the reflected light of the LEDs 141 to 144 reflected by the first objective lens cover 132 in a region that does not affect the center of the captured image.

The second dermatoscopic imaging LED144 is located in an area outside a third inversion area 503b, that is, an area outside a third inversion area 503b sandwiched by an inverted upper ray 175 'and an inverted lower ray 178', the third inversion area 503b is an area where a third area 503a is inverted with the line of the front surface 72a as an axis of symmetry, and the third area 503a is an area sandwiched by an imaginary upper ray 175a, which is the outermost upper ray, and an imaginary lower ray 178a, which is the outermost lower ray, among the rays included in the light flux incident on the imaging element 44. With such an arrangement, the influence of the reflected light of the LED144 reflected by the second objective lens cover 72 can be suppressed without affecting the central region of the captured image.

The LED144 is located inside a fourth inversion region 504b, which is an inner side of the fourth inversion region 504b sandwiched by the inverted lower beam 176 'and the inverted upper beam 177', the fourth inversion region 504b being a region where the fourth region 504a is inverted with a line of the front surface 72a of the second objective lens cover 72 as a symmetry axis, and the fourth region 504a being a region sandwiched by the virtual lower beam 176a and the virtual upper beam 177 a. The virtual lower ray 176a and the virtual upper ray 177a are outermost rays positioned at the outermost edge among the rays incident on the imaging element 44 from the imaging object side. The LED144 is disposed inside the region defined by the outermost light beams, and thus the size of the device can be reduced.

The LEDs 141, 142, and 143 are disposed at positions distant from the optical axis OA. However, by disposing the LEDs 141, 142, and 143 so as to be inclined toward the first objective lens cover 132, light can be condensed on the first objective lens cover 132, and the imaging target can be illuminated brightly without unevenness in brightness and darkness.

In addition, in order to use the second dermoscopic imaging using the adapter 70 having the second objective lens cover 72 with a small area, an LED144 is additionally provided in the vicinity of the optical axis OA. By disposing the LED144 in the vicinity of the optical axis OA in this manner, light can be easily irradiated to the second objective lens cover 72, and an imaging target can be brightly irradiated without unevenness in brightness and darkness.

The base portion body 180 and the first cover portion body 121 defining the housing space a of the first LED board 111 in which the LEDs 140 are provided are made of black synthetic resin, and the first cover portion body 121 is formed so as to cover the end surface 111a of the first LED board 111. That is, the member (the annular portion 182 and the inner wall portion 121c of the base portion body 180) defining the housing space a of the light source (the LED140) for normal imaging and located on the side of the space between the first objective lens cover 132 (the second objective lens cover 72) and the imaging portion 40 is formed of a member having a higher light absorption rate than other members (the first LED substrate 111 and the like). Accordingly, by absorbing the light transmitted through the first LED board 111 by the base portion body 180 and the first cover portion body 121, it is possible to prevent the light from irradiating components (for example, the LED144 and the like) inside the skin mirror camera 1, and further prevent the components inside from reflecting the captured image.

Further, by providing 3 kinds of light sources for percutaneous endoscopic imaging, that is, a light source emitting visible light, a light source emitting polarized light, and a light source emitting ultraviolet light, it is possible to irradiate a skin affected area with various light and to take an image useful for diagnosing the state of the skin. Further, since the skin affected area irradiated with visible light, the skin affected area irradiated with polarized light, and the skin affected area irradiated with ultraviolet light can be continuously imaged and recorded, the operation time can be shortened.

In addition, the focal position of the skin lesion to be imaged is temporarily set in accordance with the dermatoscopic imaging mode selected by the user via the liquid crystal monitor 11, that is, in the present embodiment, in accordance with the imaging mode selected from the first DC imaging mode and the second DC imaging mode. The temporarily set focal position is based on the assumed position of the skin disease portion actually imaged, and therefore, the in-focus performed at the time of actual imaging can be performed quickly.

When the normal imaging mode is selected by the user, the focus start position of the skin affected area is set to a position deviated from the virtual image generation range D1 generated from the virtual image of the components of the dermatologic camera 1 reflected by the first objective lens cover 132. This prevents the tip end portion of the lens barrel 41c, the irregularities formed on the surface of the base unit body 180, various jigs, or the virtual image of the LED144 from being reflected on the captured image, and thus enables appropriate imaging of the skin disease area.

In addition, 2 detection switches 62 for detecting the adapter 70 attached to the cover 60 are provided on the outer peripheral surface of the cover 60, and the control unit 300 determines whether or not the adapter 70 is attached at each shooting. This can prevent a situation in which the adapter 70 is forgotten to be attached when the second dermoscopic imaging in which the adapter 70 needs to be attached is performed. Further, it is possible to prevent a situation in which the adapter 70 is forgotten to be removed during normal imaging in which the adapter 70 needs to be removed and during first percutaneous endoscopic imaging.

When the illumination device 4 is viewed from the front, the 2 detection switches 62 are disposed apart from each other so as to sandwich the optical axis OA in the vertical direction. By disposing the detection switches 62 separately in this way, the control unit 300 can easily determine whether or not the adapter 70 is normally mounted, and for example, when the adapter 70 is not completely mounted, only one detection switch 62 is turned on.

(embodiment mode 2)

Next, the illumination device according to embodiment 2 and the imaging device provided with the illumination device will be described with reference to fig. 20 and 21. In embodiment 1 described above, the illumination device 4 and the dermatoscope camera 1 are prevented from being increased in size, and the influence of the reflected light of the LEDs 141, 142, and 143 used in the first dermatoscope imaging is prevented from being exerted. Further, the LED144 used in the second dermatoscope imaging can be easily irradiated with light toward the second objective lens cover 72 near the optical axis OA, and reflection of the reflected light of the LED144 can be suppressed. On the other hand, embodiment 2 is a mode in which the influence of reflected light is further suppressed (prevented). In embodiment 2, the basic configuration is the same as embodiment 1 described above, although the dimensions of the constituent elements are different. Therefore, the same reference numerals as those in embodiment 1 are used for the constituent elements of the dermatoscope camera 400 in embodiment 2.

As shown in fig. 20, LEDs 141, 142, and 143 that emit light during the first dermatoscopic imaging of the dermatoscopic camera 400 are arranged at positions further outside than those in embodiment 1. The LEDs 141, 142, and 143 of the second LED substrate 112 and the fourth LED substrate 114 are arranged in the second inversion region 502b in embodiment 1, but are arranged in a region outside the second inversion region 502b in this embodiment. The LEDs 141, 142, and 143 are also arranged in the same manner in a cross-sectional view taken along the left-right direction, that is, the LEDs 141, 142, and 143 of the third LED substrate 113 (fig. 8) and the fifth LED substrate 115 (fig. 8) are also arranged in a region outside the second inversion region 502 b. This can prevent the influence of the reflected light from the LEDs 141, 142, and 143 used in the first dermatoscope imaging.

As shown in fig. 21, the LED144 that emits light during the second dermoscopic imaging by the dermoscopic camera 400 is arranged at a position further outside than that in embodiment 1. The LEDs 144 of the sixth LED substrate 116 are located in the outer region than the fourth inversion region 504 b. The LEDs 144 of the sixth LED substrate 116 are also arranged in the same manner in a cross-sectional view taken along the left-right direction, and are located in a region outside the fourth inversion region 504 b. With such a configuration, the influence of the reflected light of the LED144 on the captured image can be prevented.

As described above, in the second embodiment, although the device is larger in size than the first embodiment, the influence of the reflected light of the LEDs 141 to 144 on the captured image can be prevented, and the influence of stray light can be suppressed.

The present invention is not limited to the above-described embodiments, and various modifications and applications can be made. In the above embodiment, the configuration in which the first dermatologic imaging LED141 that emits visible light and the second dermatologic imaging LED144 that emits visible light are arranged, respectively, has been described. However, as shown in fig. 22A and 22B, the same light source may be used as the light source for the first and second percutaneous endoscopic photographing by changing the position or direction of the light source. In fig. 22A and 22B, the LED boards 150 and 160 and the LEDs 151 and 161 shown by broken lines indicate positions at the time of first dermatoscopy imaging, and the LED boards 150 and 160 and the LEDs 151 and 161 shown by solid lines indicate positions at the time of second dermatoscopy imaging.

As shown in fig. 22A, in the first percutaneous endoscopic imaging, the LED substrate 150 (broken line) is disposed outside, and the LED151 (broken line) is disposed in a state of being inclined toward the first objective lens cover 132. On the other hand, when the second endoscopic skin imaging is performed, the LED board 150 is moved inward by a driving unit, not shown, while changing the posture so that the LED151 faces forward, as indicated by arrow Y1. In the second scholar imaging, the LED substrate 150 (solid line) is disposed closer to the optical axis OA, and the LED151 (solid line) is disposed facing forward. By moving the LED substrate 150 on which the LEDs 151 are mounted in this manner, the LEDs 151 can be used as a light source for the first and second percutaneous endoscopic photographing.

As shown in fig. 22B, in the first percutaneous endoscopic imaging, the LED board 160 (broken line) is disposed outside, and the LED161 (broken line) is disposed in a state of being inclined toward the first objective lens cover 132. On the other hand, when the second mirror imaging is performed, the LED substrate 160 is rotated by a driving means not shown so that the LED161 faces the second mirror cover 72, as indicated by an arrow Y2. By directing the LED161 toward the second objective lens cover 72 in this way, light can be irradiated to the entire area of the second objective lens cover 72, and the skin disease portion in contact with the second objective lens cover 72 can be brightly illuminated without unevenness in brightness and darkness. By rotating the LED substrate 160 on which the LEDs 161 are mounted in this manner, the LEDs 161 can be used as a light source for the first and second percutaneous endoscopic imaging as well.

In the above embodiment, the control unit 300 determines whether or not the attachment state of the adapter 70 is correct, and then performs imaging based on the imaging mode input from the user. That is, upon selection of the photographing mode, input of the photographing mode from the user is basic. However, the present invention is not limited to this embodiment, and, for example, the control unit 300 may determine the attachment state of the adapter 70 and determine the shooting mode when there is no input of the shooting mode by the user. Such an imaging operation will be described with reference to fig. 23.

In the shooting operation (step S70), first, the control unit 300 determines whether or not the adapter 70 is attached to the lighting device 4 (step S71). As described above, the presence or absence of the attachment of the adapter 70 is determined from the on/off state of the detection switch 62. In step S71, when it is determined that the adapter 70 is mounted (yes in step S71), the control unit 300 sets the second DC photographing mode, and when there is a photographing operation by the user, performs a second dermatoscopic photographing operation (step S72). The second dermatoscopic photographing operation (step S72) is the same as the second dermatoscopic photographing operation (S50) shown in fig. 18. Before executing step S72, control unit 300 may display on liquid crystal monitor 11 shown in fig. 2 that the shooting mode is the second DC shooting mode. This enables the user to recognize the current shooting mode of the camera.

When the detachment of the adapter 70 is detected after the second dermoscopic photographing operation (step S72) (yes in step S73), the control unit 300 shifts to the normal photographing mode or the first DC photographing mode. Then, the control section 300 executes the normal shooting operation or the first dermoscopic shooting operation in accordance with the shooting operation by the user (step S74). In this way, the control unit 300 switches from the second DC shooting mode to the normal shooting mode or the first DC shooting mode without an operation input by the user by detecting the removal of the adapter 70. In addition, in step S74, the user can select which of the normal shooting mode and the first DC shooting mode is set to via the liquid crystal monitor 11 shown in fig. 2.

When the attachment of the adapter 70 is detected after the normal shooting operation or the first dermoscopic shooting operation (step S74) (yes in step S75), the control unit 300 advances the process to step S72 to switch the shooting mode to the second DC shooting mode. In this way, the control unit 300 detects the attachment of the adapter 70, and switches from the normal shooting mode or the first DC shooting mode to the second DC shooting mode without an operation input from the user.

On the other hand, if the removal of the adapter 70 is not detected in step S73 (no in step S73), the control unit 300 waits in the second DC shooting mode without switching the shooting mode, and executes the second mirror imaging operation if there is a user' S shooting operation (step S72). If the mounting of the adapter 70 is not detected in step S75 (no in step S75), the controller 300 waits in the normal shooting mode or the first DC shooting mode without switching the shooting mode.

When it is determined in step S71 that the adapter 70 is not mounted (no in step S71), the control unit 300 shifts to the normal shooting mode or the first DC shooting mode, and executes the normal shooting operation or the first dermoscopic shooting operation in accordance with the shooting operation by the user (step S74).

When the normal photographing operation or the first dermoscopic photographing operation is performed (step S74), the control section 300 advances the process to S71. When it is determined that the adapter 70 is not mounted (S71: yes), the control unit 300 shifts to the second DC shooting mode. In this way, by detecting the attachment/detachment of the adapter 70 by the control unit 300, the imaging mode can be switched between the second dermatoscopic imaging operation and the normal imaging operation or the first dermatoscopic imaging operation without the operation of the user.

In the above embodiment, 2 detection switches 62 of the detection adapter 70 are provided, but it is arbitrary to provide several detection switches 62, and the number of detection switches 62 may be more than 2. This makes it possible to grasp the attachment state of the adapter 70 more accurately. Further, only 1 detection switch 62 may be provided, and a simple configuration may be configured.

In the above-described embodiment, when the set shooting mode is not appropriate for the attachment state of the adapter 70, this is displayed on the liquid crystal monitor 11 shown in fig. 2, but other means may be used as the notifying means for notifying the user. For example, a speaker for outputting a sound to the dermatoscope camera 1 may be provided to give a notification by a buzzer sound or the like, or a sound for transmitting an error may be emitted. In addition, when the set shooting mode is not appropriate for the attachment state of the adapter 70, the shutter button 21 may be operated, and imaging may not be performed. At this time, the liquid crystal monitor 11 may display this information and notify the user of the operation of the inappropriate shutter button 21, or may notify the user by emitting a buzzer sound or a voice from a speaker.

In addition, when the set shooting mode is not appropriate for the attachment state of the adapter 70, it is not necessary to perform the report in all the situations described above, and the step of reporting can be appropriately omitted. For example, steps S21 to S23 of reporting in the first DC photographing mode shown in fig. 16 may be omitted, and steps S24 to S27 of reporting in the second DC photographing mode may also be omitted. Further, step S25 and step S27 for reporting improper mounting of the adapter 70 may be omitted.

Further, as a means for detecting the adapter 70, the detection switch 62 that is switched on and off in accordance with the presence or absence of physical pressing of the adapter 70 is provided, but another detection means may be provided. For example, the following configuration may be adopted: electrical contacts are provided between the adapter 70 and the housing 60, and the adapter 70 is mounted so that the contacts contact each other and allow current to flow. By detecting the current flowing, it is possible to determine whether or not the connector 70 is mounted.

In the above-described aspect, the position of the light source is defined based on an inversion region formed by inverting a region defined by an upper ray and a lower ray from the skin as the imaging target with the objective lens cover as the axis of symmetry. However, since the light source is disposed at a distance from the optical axis OA, reflection of the light source in the captured image can be suppressed, and therefore, a slight shift is allowed in the symmetry axis for forming the inversion region. In addition, the inversion region and the region of the inversion source do not need to have exactly the same shape and size, and some difference in shape and size is allowed even if there is some difference.

The LEDs 141, 142, and 143 may be disposed at other suitable positions, for example, outside the inversion region defined by the virtual light beam using the angle of view of the imaging unit 40 in the first dermatoscope imaging, if the inversion region 502b is outside the second inversion region. The LED144 may be disposed at another suitable position, for example, at a position outside the inversion region defined by an imaginary ray using the angle of view of the imaging unit 40 in the second dermatoscopic imaging, if it is outside the fourth inversion region 504 b. With this arrangement, the influence of the reflected light from the LEDs 141 to 144 on the captured image can be suppressed.

In the above embodiment, the first to fourth regions 501a to 504a and the first to fourth inverted regions 501b to 504b as the inverted regions are truncated conical regions. However, due to the aperture provided in the lens group, these regions are not circular truncated cone-shaped regions but elliptical truncated cone-shaped regions. In the case of a truncated cone-shaped region of an ellipse, the light beam may be set in consideration of the major axis and the minor axis of the ellipse, and the position of the light source may be determined.

In addition, although the skin-mirror camera 1 is described as an example of the imaging device to which the illumination device is applied in the above embodiment, the present invention can be applied to other imaging devices. The present invention can be applied to any imaging device having a configuration in which an imaging target located on one side of a light-transmitting cover body is irradiated with light by an imaging unit and a light source located on the other side to perform imaging. For example, the present invention can be applied to an imaging device that images an image of a surface of a structure to be inspected, and can also be applied to an imaging device that images an inserted gap by irradiating light.

Further, 3 types of light sources, that is, a light source that emits visible light, a light source that emits polarized light, and a light source that emits ultraviolet light, are provided as light sources for the dermatoscopy imaging, but the number of the light sources can be appropriately set according to the imaging subject. For example, only 1 of these light sources may be provided. In addition, for example, a light source that emits near-infrared light may be provided, and the number of types of light sources may be further increased.

As the light source for the second percutaneous endoscopic imaging using the adapter 70, the LED144 for emitting visible light is provided at a position close to the optical axis OA, but it is arbitrary whether such a light source for the second percutaneous endoscopic imaging is provided. As the light source for the second dermatoscopy, another type of light source, for example, a light source emitting polarized light may be provided at a position close to the optical axis OA, and a light source emitting ultraviolet light may be provided at a position close to the optical axis OA. In this way, the light source for the first dermatoscope imaging and the light source for the second dermatoscope imaging may be provided by all kinds of light sources.

The second cover portion 130 provided with the first objective lens cover 132 is configured to be attachable and detachable by screws, and the adapter 70 provided with the second objective lens cover 72 is configured to be attachable and detachable by hook-shaped engaging members. For example, the second boot portion 130 and the adapter 70 may have the following structure: the image pickup apparatus includes a rotation shaft movable between a position covering the front of the image pickup apparatus and a position rotated from a state covering the front to open the front of the image pickup apparatus.

In the second dermatoscope imaging, as shown in fig. 6, adapter 70 is attached with second cover portion 130 attached, but may be configured such that second cover portion 130 is detached and attached. Thus, the second cover portion 130 for the first dermatoscope imaging can be eliminated between the adapter 70 and the imaging unit 40 at the time of the second dermatoscope imaging, and the design of the dermatoscope camera 1 suitable for the second dermatoscope imaging becomes easy. In order to prevent forgetting to remove second cover portion 130 when performing the second dermatome imaging, the outer diameter of second cover portion 130 may be increased, or adapter 70 may not be attached to second cover portion 130 by providing second cover portion 130 with a protrusion. The adapter 70 may be attached to the adapter 70 by forming a male screw on the bottom (rear end) and screwing it into a female screw 121e (fig. 9) formed on the inner wall 121 c.

Instead of the second cover portion 130 to which the first objective cover 132 is detachably provided, the second cover portion 130 may be fixed to the first cover portion 120 (fig. 5), for example. Alternatively, second cup portion 130 may be formed integrally with first cup portion 120 (fig. 5). This can simplify the structure of the dermatoscope camera 1.

In addition, when the focal position of the imaging target is in the virtual image generation range D1 in the normal shooting, the shutter button 21 may be operated and imaging may not be performed. At this time, the liquid crystal monitor 11 may display an image that urges the skin mirror camera 1 to be further separated from the imaging target and to be captured. This enables the user to capture an image of the imaging target from an appropriate position where the virtual image is not reflected.

Further, in the case of the percutaneous endoscopic imaging, the imaging is repeated while sequentially emitting the different types of light sources by one operation of the shutter button 21, but the percutaneous endoscopic imaging may be performed by emitting only the light source designated by the user.

The adapter 70 for imaging a narrow part is of any configuration, and if the imaging device is not intended to image a narrow part, the adapter 70 is not necessary. In this case, since the second dermatoscopic imaging is not necessary, the light source (for example, the LED144) for the second dermatoscopic imaging may not be provided.

The base portion body 180 and the first cover portion body 121 defining the housing space a of the first LED board 111 are made of, for example, black synthetic resin so that light from the light source (LED140) for normal imaging does not irradiate the inside of the skin mirror camera 1, but may be made of synthetic resin of another color that easily absorbs light. In order to suppress light leakage into the interior of the skin mirror camera 1, the base portion body 180 and the first cover portion body 121 that separate the space a and the space B shown in fig. 9 may be configured to appropriately block light from a light source for normal imaging located in the space a.

For example, as shown in fig. 9, the outer surface shown at a1 of the first cover body 121 and the outer surface shown at a2 of the base body 180 may be mirror-finished so as to reflect the light L1 and the light L2 in a mirror-like manner so that the light does not enter the first cover body 121 and the base body 180 themselves. In the mirror finishing, a known mirror finishing technique of applying a silver film to a surface or applying chrome plating can be used. In this way, by providing the first cover part body 121 and the base part body 180 with the light reflection means having an improved light reflectance, light leakage into the interior of the skin mirror camera 1 can be suppressed.

Alternatively, a commercially available shielding tape, a rubber plate, a metal plate, or the like that can shield light from the light source (LED140) may be attached to the outer surface indicated by a1 of the first cover part main body 121 and the outer surface indicated by a2 of the base part main body 180 to shield the light.

Alternatively, the first cover part main body 121 and the base part main body 180 may be made of a material through which light is not easily transmitted. For example, the first cover part main body 121 and the base part main body 180 may be made of metal such as aluminum or stainless steel, or may be made of black rubber material.

As described above, the base portion body 180 and the first cover portion body 121 that partition the housing space a and the space B are provided with light shielding means for shielding light so that light from the normal imaging LED140 positioned in the housing space a does not leak to the tip portion of the lens barrel 41c and the space B where the dermatologic imaging LEDs 141, 142, 143, and 144 are positioned. The light shielding unit may employ various units as described above.

The scope of the present invention is not limited to the above-described embodiments, and includes the scope of the invention described in the claims and the equivalent scope thereof.

The present application claims priority based on japanese patent application laid-open No. 2019-66958, applied on 29/3/2019, and japanese patent application laid-open No. 2019-98137, applied on 24/5/2019. In the present specification, reference is made to the entire contents of the specification, claims and drawings of Japanese patent application laid-open Nos. 2019-66958 and 2019-98137.

Industrial applicability

The present invention is particularly useful for appropriately imaging an object while suppressing the influence of reflected light from a light source.

Description of the reference numerals

1 … dermoscopy camera; 2 … a controller; 3 … camera body; 4 … lighting device; 10 … display part; 11 … liquid crystal monitor; 20 … a body portion; 21 … shutter button; 22 … power button; 30 … circuit substrate; 40 … imaging part; 41 … camera lens system; 41a … first imaging lens; 41b … second imaging lens; 41c … lens barrel; 43 … circuit wiring board; 44 … image pickup element; 45 … infrared cut filter; 46 … ultraviolet transmission filter; a 47 … polarization filter; 48 … flexible circuit substrate; 50 … frame bodies; 60 … cover body; a 61 … protrusion; 62 … detection switch; 62a … spring; 70 … an adapter; 70a … inner wall; 71 … a cylinder; 71a … opening; 71b … hook; 72 … second objective lens cover; 72a … front surface; 73. 74 … area of the second objective housing; 74a … darkened area; 100 … lighting fixture body; 110 … a base portion; 111-116 … first-sixth LED substrates; 116a … lens barrel insertion hole; a 117 … polarizing plate; 120 … a first cover portion; 121 … first cover body; 121a … cover; 121b … outer wall portion; 121c … inner wall portion; 121d … light exit aperture; 121e … internal threads; 122 … light-transmitting panel; 130 … a second cover portion; 131 … cylindrical body; 131a … opening; 131b … external threads; 132 … a first objective lens cover; 132a … front surface; 132b … rear surface; 140-144 … LEDs; 150 … LED substrate; 151 … LED; 160 … LED substrate; 161 … LED; 171. 173, 175, 177 …; 171 ', 173', 175 ', 177' … reverse the upper rays; 172. 174, 176, 178 …; 172 ', 174', 176 ', 178' … reverse down rays; 180 … a base portion body; 181 … a cylindrical part; 182 … annular portion; 182a … substrate mounting surface; 183-186 … first-fourth wall parts; a 187 … connection; 188 … fifth wall portion; 188b … lens barrel insertion hole; 189 screws 189 …; 200 … storage part; 300 … control section; 400 … dermoscopy camera; 404 … lighting device; 501a … first area; 501b … first inversion region; 502a … second region; 502b … second inversion region; 503a … third area; 503b … third inversion region; 504a … fourth region; 504b … fourth inversion region; a … accommodating space; d1 … virtual image generation range; p1 … focus start position; p2, P3 … focal position; s1, S2 … skin; OA … optical axis; r 1-r 4 … region

Claims (18)

1. An illumination device applied to an imaging unit for imaging an object, comprising:

an objective lens cover configured by a member that transmits light, and configured to guide light from the object to the imaging unit in order for the imaging unit to image the object; and

a light source provided on the image pickup section side of the objective lens cover and configured to illuminate the object through the objective lens cover,

the image pickup section includes an image pickup element that picks up an image of the object and an image pickup lens that forms an image of the object on the image pickup element,

the light source is provided outside an inversion region, the inversion region being a region where a region defined by a predetermined light ray included in a light flux incident on the image pickup device from the object side via the imaging lens in a state where the imaging lens is focused on the object in contact with the objective lens cover, the light flux being closer to the object side than the objective lens cover, is substantially inverted to the image pickup unit side in the objective lens cover.

2. The lighting device according to claim 1, wherein the predetermined light ray is an outermost upper light ray among a plurality of upper light rays included in the light beam and an outermost lower light ray among a plurality of lower light rays included in the light beam.

3. The lighting device according to claim 1, wherein the prescribed light ray is an outermost light ray of outermost edges of the plurality of light rays included in the light beam.

4. The illumination device according to any one of claims 1 to 3, wherein the inversion region is a region where a region specified by the specified light ray is inverted substantially to the image pickup portion side on the object side surface of the objective lens cover.

5. The illumination device according to any one of claims 1 to 4, wherein the light source is configured by a plurality of light sources which are provided symmetrically with each other in a direction orthogonal to the optical axis of the imaging unit with the optical axis of the imaging unit as a center.

6. The illumination device according to claim 5, wherein the plurality of light sources are arranged such that light irradiated from the plurality of light sources is condensed with each other in the entirety of the objective lens cover.

7. The lighting device according to claim 5 or 6, wherein the plurality of light sources includes at least 1 of a light source that irradiates visible light, a light source that irradiates ultraviolet light, and a light source that irradiates light that deflects visible light.

8. The lighting device of claim 1,

the objective lens cover is configured to be able to selectively adopt at least a first objective lens cover and a second objective lens cover,

the area of the surface of the first objective lens cover orthogonal to the optical axis of the imaging unit is set to a predetermined first area,

the area of the surface of the second objective lens cover orthogonal to the optical axis of the image pickup unit is set to a predetermined second area smaller than the first area,

the light source includes: a first light source for illuminating the object via the first objective housing; and a second light source for illuminating the object via the second objective housing,

the first light source is provided outside a first inversion region, the first inversion region being a region where a region defined by a first predetermined light ray included in a light flux incident on the image pickup element from the object side via the imaging lens in a state where the imaging lens is focused on the object in contact with the first objective lens cover and closer to the object side than the first objective lens cover is substantially inverted to the image pickup element side in the first objective lens cover,

the second light source is provided outside a second inversion region that substantially inverts a region defined by a second predetermined light beam to the image pickup section side in the second objective lens cover, the second predetermined light beam being a light beam included in a light beam incident on the image pickup element from the object side via the image pickup lens in a state where the image pickup lens is focused on the object in contact with the second objective lens cover, the light beam being closer to the object side than the second objective lens cover.

9. The lighting device of claim 8,

the first predetermined light beam is an outermost upper light beam of a plurality of upper light beams included in the light flux incident on the image pickup device from the object side through the image pickup lens in a state where the image pickup lens is focused on the object in contact with the first objective lens cover, and an outermost lower light beam of a plurality of lower light beams included in the light flux,

the second predetermined light beam is an outermost upper light beam among a plurality of upper light beams included in the light flux incident on the image pickup element from the object side through the image pickup lens in a state where the image pickup lens is focused on the object in contact with the second objective lens cover, and an outermost lower light beam among a plurality of lower light beams included in the light flux.

10. The lighting device of claim 8,

the first predetermined light ray is an outermost light ray of an outermost edge of a plurality of light rays included in the light flux incident on the image pickup device from the object side via the image pickup lens in a state where the image pickup lens is focused on the object in contact with the first objective lens cover,

the second predetermined light beam is an outermost light beam of outermost edges of a plurality of light beams included in the light flux incident on the image pickup element from the object side through the image pickup lens in a state where the image pickup lens is focused on the object in contact with the second objective lens cover.

11. The lighting device according to any one of claims 8 to 10,

the first inversion region is a region in which a region defined by the first predetermined light beam is substantially inverted to the image pickup portion side on the surface of the objective lens cover on the object side,

the second inversion region is a region in which a region defined by the second predetermined light beam is substantially inverted to the image pickup portion side on the surface of the objective lens cover on the object side.

12. The lighting device according to any one of claims 8 to 11,

the first light source is composed of a plurality of first light sources, and lights irradiated from the plurality of first light sources are arranged to be mutually condensed in the whole first objective lens cover,

the second light source is configured by a plurality of second light sources, and lights irradiated from the plurality of second light sources are arranged to be mutually condensed in the whole second objective lens cover.

13. The lighting device of claim 12,

each of the plurality of first light sources and each of the plurality of second light sources are constituted by mutually identical light sources,

the same light source is configured to selectively function as the first light source and the second light source by changing a position with respect to the first objective lens cover and the second objective lens cover or an angle of light irradiated from the same light source.

14. The lighting device of any one of claims 8 to 13, wherein the first light source comprises at least 1 of a light source of visible light, a light source of ultraviolet light, and a light source that deflects visible light.

15. An imaging device comprising the illumination device according to any one of claims 1 to 14 and the imaging unit, and imaging a skin of a human body as the object,

the objective lens cover of the illumination device is configured to come into contact with the skin when the skin is imaged by the imaging device.

16. An imaging device comprising the illumination device according to any one of claims 8 to 14 and the imaging unit, and imaging a skin of a human body as the object,

the first objective lens cover is arranged on the top of a cylindrical first cover arranged on the lighting device,

the second objective lens cover is arranged on the top of the cylindrical second cover,

the second cover has a detachable unit detachable from the lighting device at a portion other than the top portion,

the first objective lens cover is adopted as the objective lens cover that is in contact with the skin in a state where the second cover is detached from the illumination apparatus via the attachment and detachment unit,

the second objective lens cover is adopted as the objective lens cover that is in contact with the skin when the second cover is in a state of being attached to the illumination device via the attachment/detachment means so as to cover the first cover.

17. The imaging apparatus according to claim 16, further comprising:

a setting unit that selectively sets a shooting mode in which the image pickup unit shoots the subject to any one of a plurality of shooting modes in accordance with an operation of the image pickup apparatus by a user, the plurality of shooting modes including: a first photographing mode in which the subject is photographed in a state in which the subject is illuminated with the first light source without using the second light source; and a second photographing mode of photographing the subject in a state where the subject is illuminated with the second light source without using the first light source;

a detection unit that detects whether or not the second cover is attached to the lighting device; and

and a reporting unit configured to report to the user that at least 1 of the conditions is satisfied, the conditions being that the detection unit detects that the second cover is attached to the lighting apparatus and the imaging mode is set to the first imaging mode, and the conditions being that the detection unit detects that the second cover is not attached to the lighting apparatus and the imaging mode is set to the second imaging mode.

18. The imaging apparatus according to claim 16, further comprising:

a setting unit that selectively sets a shooting mode in which the image pickup unit shoots the subject to any one of a plurality of shooting modes in accordance with an operation of the image pickup apparatus by a user, the plurality of shooting modes including: a first photographing mode in which the subject is photographed in a state in which the subject is illuminated with the first light source without using the second light source; and a second photographing mode of photographing the subject in a state where the subject is illuminated with the second light source without using the first light source; and

a detection unit that detects attachment and detachment of the second cover to and from the lighting device,

the setting unit switches the photographing mode to the second photographing mode when the detection unit detects that the second cover is attached to the lighting apparatus in a state where the photographing mode is set to the first photographing mode, and switches the photographing mode to a photographing mode other than the second photographing mode among the plurality of photographing modes when the detection unit detects that the second cover is detached from the lighting apparatus in a state where the photographing mode is set to the second photographing mode.

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